Question

Explain why 7 * 11 * 13 + 13 and
7 x 6 * 5 * 4 * 3 * 2 x 1 + 5 are composite numbers ?
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Answer 1

$\huge\pink{Answer}$

Given

7×11×13+13

= 13× (7× 11+ 1)= 3× 78

This number is multiple of two integers.Hence it has more than two factors.Hence it is a composite number.

similarly in

7× 6 ×5 ×4 ×3 ×2 ×1+ 5 7×6= 5×4 ×3 ×2 ×1+ 1)= 5× 1009

This number is multiple of two integers.Hence it has more than two factors.Hence it is a composite number.

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Answer 2

Answer:

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